Brake devices for use with bobbin holders



06L 1962 J. NOGUERA 3,059,864

BRAKE DEVICES FOR USE WITH BOBBIN HOLDERS Filed Jan. 13, 1961 United States Patent ()1 3,059,864 BRAKE DEVICES FOR USE WITH BOBBHI HOLDERS Joseph Nognera, London, England, assignor to Casablancas High Draft Company Limited, Salford, England, a British company Filed .lan. 13, 1961, Ser. No. 82,493 Claims priority, application Great Britain Feb. 25, 1960 8 Claims. (Cl. 242129.8)

This invention relates to brake devices for use with bobbin holders of the type incorporating a spindle-like bobbin-engaging body rotatably suspended at the head end from a mounting bolt or like member having an upwardly projecting shank attachable to an overhead creel rail or bracket support.

In order to work effectively, overhead rotary suspension-type bobbin holders must rotate extremely freely since otherwise the tension needed to overcome the resistance of the bobbin holders would break the very weak roving which is pulled from the bobbins. If, however, there is a considerable length (and weight) of roving between the bobbin and the drafting system, due to the height of the creel, freely rotating bobbin holders may tend to over-run. As a result too much roving is delivered which tends to accumulate on the drafting sys tem or on the creel board. It is therefore common practice to use brake devices in such cases which usually consist of a metal strip or rod member hanging from a point near the top of the bobbin holder and shaped so as to rest on the outer surface of the roving wound on the hanging bobbin.

For completely satisfactory working, brake devices for such bobbin holders should satisfy the following conditions:

(a) They must act more strongly on full bobbins than on bobbins that are nearly empty,

(b) They must be easy to fit, either when installing new bobbin holders or as an addition to bobbin holders already mounted,

(c) They must be capable of being easily positioned at any desirable point around the bobbin,

(d) They must be proof against accidental removal,

(e) They must, when hanging freely (i.e. when there is no bobbin supported on the holder), have their lower ends well clear of the axis of the bobbin holder. If the brakes come near to, or reach, this axis they hamper the creeling of bobbins,

(7) They must offer little or no opportunity for dust and fly to collect, and

(g) They must be cheap and simple.

Many brake devices for bobbin holders are already known which go some way towards fulfilling the aforementioned conditions, and a main object of the present invention is to provide a generally improved brake device which is capable of complying with all the aforementioned conditions for satisfactory working.

According to the invention, there is provided a brake device wherein a brake finger is arranged pivotally to depend from a support arm having an open-slotted part which can be clamped between the bobbin holder head and creel rail or bracket in any position of rotation around the holder, it being necessary only slightly to loosen oif the mounting bolt or like member in relation to the creel rail or bracket for the purpose of positioning or removing the support arm.

In order that the invention may be clearly understood and readily carried into effect, an embodiment thereof will now be described in detail with reference to the accompanying drawings in which:

FIGURE ,1 is a side elevational view showing a brake device of the invention and a bobbin holder operatively 3,059,864 Patented Oct. 23, 1962 suspended from an overhead, diagrammatically illustrated, support, and

FIGURE 2 is a plan view of FIGURE 1 with the support omitted.

Referring now to the drawings, a rotary suspensiontype bobbin holder, to which the brake device is applied, has a spindle-like body 1 which depends from the head of a mounting bolt or like member, not shown. The shank of the mounting member then projects upwardly in the axial direction of the body to engage, for example, a nut trapped within a hollow overhead support 2 such as a creel rail. A holder cap 3 is arranged, in known manner, loosely to encompass the upper end of the holder body, the cap crown being non-rotatably engaged with the mounting member shank which projects through an aperture in the crown.

The brake device incorporates a support arm 4 which has a fiat top for bearing against the under surface of the creel rail and, at one end, is provided with dependent side cheeks 4a the rear edges of which are curved outwardly beyond the adjoining end edge of the arm. At the other end, the flat top of the arm is rounded and provided with a narrow dependent rim around the rounded edge to form a shallow inverted cup-like part 4b. This cup-like part is formed with an open slot 5 which extends, transversely to the longitudinal arm axis, from the centre of the cup base through to the cup rim, and has a width which is slightly greater than the diameter of the mounting member shank. The dimensioning of the inverted cup part is such that it will fit closely over the top of the holder cap 3 with the slot engaging the aforesaid shank.

Between the dependent side cheeks of the arm 4 there is provided a transverse pivot pin 6 which is spaced sufficiently below the inverted arm base to enable one end of a brake finger to be hooked thereover. This finger conveniently consists of a rod 7 bent into arcuate form and having an upper end 7a which is returned inwardly in the plane of the arc for hooked engagement with the pivot pin 6 on the support arm as shown. The opposite or lower end 7b of the brake rod is turned outwardly, again in the plane of the arcuate rod.

For operatively positioning the described device, the upper hooked end 7a of the brake rod is first engaged over the pivot 6 on the support arm and the cup-shaped arm end 4b is then slid laterally into position over the holder cover and around the mounting member shank. For this purpose the mounting member needs to be only a few turns short of the fully screwed home position, since the cupped end of the support arm is suificiently shallow to pass through a relatively narrow gap between the top of the cap and the overlying support 2. Once located, the support arm 4 can be rotated around the mounting member shank into any desired position of adjustment and can then be firmly clamped by tightening up the aforesaid member.

The arrangement of the upper hooked end of the brake rod is such that the returned rod extremity has to be located approximately parallel to the inverted base of the support arm to pass over the arm pivot 6, whereupon the rod can swing downwardly about the pivot into the hooked pendent position as shown. Once the device is mounted on an overhead support, however, the rod cannot be disengaged from its pivot since the returned upper rod extremity 7:: will be prevented from taking up the withdrawal position by abutment against the holder cap 3. This abutment at the same time, serves to limit the amount by which the lower end 7]; of the brake rod can swing inwardly when there is no bobbin on the holder, so that the lower rod end will be maintained well clear of the bobbin body axis and will not impede the creeling of a new bobbin.

The dependent cheeks 4a, which carry the pivot on the support arm, allow adequate clearance for free angular movement of the brake rod about its pivot, but at the same time, provide lateral guides which prevent the rod from rocking sideways.

The out-turned lower end 7b of the brake rod presents a smooth rounded surface for bearing against a roving on a creel bobbin and providing the necessary braking action. Any one of a variety of lengths of brake rod may be used with the same support arm to allow for the wide range of bobbin sizes which are employed in different mills. In FIGURE 1 of the drawings, the lower ends of two further brake rods having diiferent lengths are shown in chaindotted lines. Moreover, the shape, thickness and material of the brake rod may be chosen so as to provide exactly the correct restraint on the bobbin.

As a result of the snug fit of the support arm on the bobbin holder cap and the rounded configuration of the support arm side cheeks, there is a minimum opportunity for dust and fly to collect on the support arm. The collection of dust and fly is also further minimised by employing a brake rod of circular section.

I claim:

1. For use with a suspension-type bobbin holder having a head cap through which a mounting member projects for engaging an overhead creel support,

(a) a brake device comprising (b) a support arm with one end adapted for clamped engagement between said head cap and creel support,

() a transverse pivot positioned on the said arm towards the opposite end of the latter and (d) a brake finger having a hooked upper end engageable over said pivot so that, when the said arm is clamped in position as aforesaid with the hooked finger end engaging the pivot, the said finger pivotally depends lengthwise of the holder whilst abutment of the hooked finger end against the cap serves to limit inward angular displacement of the finger and to prevent disengagement of the hook from the pivot.

2. A brake device as claimed in claim 1 wherein (e) the arm end adapted for clamping between said head cap and creel support has (1) a shallow inverted cup-like configuration with an open slot extending, transversely to the longitudinal arm axis, from the center of the cup base through to the cup rim,

(g) the said cup-like part being dimensioned to fit closely over the top of the head cap with the slot engaging around the mounting member.

3. A brake device as claimed in claim 2 wherein the support arm has a flat top for bearing against the under surface of the overhead creel support and, at the end remote from the inverted cup-like part, is provided with dependent side cheeks between which the transverse pivot is carried for supporting the brake finger.

4. A brake device as claimed in claim 3 wherein the dependent side cheeks are spaced apart sutficiently to allow adequate clearance for free angular movement of the brake finger about the pivot and, at the same time, are shaped to provide lateral guides Which prevent the brake finger from rocking sideways on the pivot.

5. A brake device as claimed in claim 1 wherein the brake finger consists of a rod bent into arcuate form and having an upper end which is returned inwardly in the plane of the arc for hooked engagement with the support arm pivot.

6. A brake device as claimed in claim 5 wherein the returned upper rod end is arranged to abut the holder cap when the device is operatively positioned whereby the amount by which the lower rod end can swing inwardly, in the absence of a bobbin on the holder, is limited and disengagement of the rod from its pivot is positively prevented.

7. For use with a suspension-type bobbin holder having a head cap through which a mounting member projects for engaging an overhead creel support,

(a) a brake device comprising (b) a brake finger having (0) an upper part and (d) a lower part,

(e) means adapted to mount the finger on the support so that its lower part engages the roving on the bobbin to set up a braking action on the bobbin and said lower part is free to approach the axis of the bobbin holder as the roving is withdrawn from the bobbin to maintain the braking effect on the bobbin and (1) so that the upper part of the finger is free to approach the head cap as the roving is withdrawn from the bobbin to abut the head cap when the bobbin is emptied to arrest the lower part of the finger at a position in which it maintains its braking effect on the bobbin but is spaced radially outward of the bobbin holder.

8. A brake device as claimed in claim 7 wherein (g) said brake finger is round in cross section and (h) entirely imperforate.

References Cited in the file of this patent UNITED STATES PATENTS 

